A Datacard is an electornic device that stores some information exchanged by the Underground of New York. It can be accessed by a computer such as a MAD.
The End is Near.
The Way is Clear.
Destroy the Lady,
Before They are Ready.
Phil is Trouble
He's a Double.
He's an Eye,
That's no Lie!
The huckster with the kewpie dolls in the Coney Island fun park, a member of the Underground, had the Datacard and expected for someone who knocks down the dolls in a certain order and provides an anti-Orb medallion, in order to pass them the datacard.
Anna Osborne was expected to perform the sequence and receive the Datacard, but apparently she lost her medallion in the Cave at Dreier Offerman Park and was unable to take it. The Manhunter followed her traces, got the Datacard and completed her mission.